Method for producing a leather ball having a simulated sewing pattern

Abstract

The method for producing a leather ball having a simulated sewing pattern.

1 . A method for producing a leather ball with a simulated sewing pattern, comprising: 
 making a rubber bladder, comprising: 
 at least one of grinding, kneading, and mixing a rubber with MASTERBATCH and SB11 for approximately two (2) minutes;  
 at least one of grinding, kneading, and mixing the rubber with a chemical compound for approximately one (1) minute;  
 immersing the rubber in a starch slurry;  
 drying the rubber;  
 at least one of grinding, kneading, and mixing the rubber for approximately one (1) minute to make the rubber softer;  
 forming the rubber at a temperature of between approximately sixty (60) degrees Celsius and approximately ninety (90) degrees Celsius into a rubber sheet having a thickness of approximately zero point nine (0.9) millimeters and approximately zero point nine five (0.95) millimeters;  
 install an air filling tube in the rubber sheet at a position between approximately nine (9) inches and approximately twelve (12) inches from a perimeter of the rubber sheet;  
 form the rubber sheet at a temperature of between approximately sixty (60) degrees Celsius and approximately ninety (90) degrees Celsius into a round shape to form the rubber bladder having a weight of between approximately one hundred thirty-five (135) grams and approximately one hundred forty-five (145) grams;  
 curing the rubber bladder for approximately three (3) minutes at a temperature of between approximately one hundred fifty-five (155) degrees Celsius and approximately one hundred sixty-five degrees Celsiusc at a pressure of at least approximately five point five (5.5 Kg/cm2) kilograms per centimeter squared;  
 installing the air filling tub valve into the rubber bladder;  
 comparing a size of the rubber bladder with a template and if the size is accurate, winding the rubber bladder using approximately twelve hundred (1,200) cycles in a winding machine;  
   making a middle rubber layer, comprising: 
 preparing a rubber by mixing a natural rubber and a synthetic rubber for approximately two (2) minutes and then adding a coloring material and further at least one of grinding, kneading, and mixing the rubber for approximately five (5) minutes;  
 mixing the rubber with Sulphur for approximately five (5) minutes;  
 immersing the rubber in a starch slurry;  
 drying the rubber;  
 softening the rubber by at least one of grinding, kneading, and mixing the rubber for approximately one (1) minute;  
 calendaring the rubber at a temperature of between approximately sixty (60) degrees Celsius and approximately ninety (90) degrees Celsius to form a rubber sheet having a thickness of between approximately zero point seven (0.7) millimeters and approximately zero point seven five (0.75) millimeters;  
 cutting the rubber sheet into a plurality of rubber patches;  
 attaching the rubber patches into a mold and position the rubber bladder therein to form the middle rubber layer;  
 curing the rubber patches and the rubber bladder for approximately sixteen (16) minutes for 16 minutes;  
 installing an air filling valve in the middle rubber layer;  
 place an adhesive over the middle rubber layer;  
   making leather patches, comprising: 
 cutting a leather to form leather patches having a desired shape;  
 place any desired pattern onto the leather patches;  
 cutting generally along a perimeter of the leather patches along a surface of the leather patches that contacts the middle rubber layer to reduce a thickness of the leather patches along the perimeter;  
 applying adhesive to the surface of the leather patches;  
   combining the leather patches and the middle rubber layer to make a leather ball with a simulated sewing pattern, comprising: 
 attaching the leather patches to middle rubber layer to form the leather ball;  
 curing the leather ball for approximately one and one half (1.5) minutes at a temperature of between approximately forty (40) degrees Celsius and approximately fifty (50) degrees Celsius.  
   
     
     
         2 . A method for producing a leather ball with a simulated sewing pattern, comprising: 
 making a rubber bladder;    making a middle rubber layer, comprising: 
 preparing a rubber by mixing a natural rubber and a synthetic rubber;  
 mixing the rubber with Sulphur;  
 immersing the rubber in a starch slurry;  
 softening the rubber by at least one of grinding, kneading, and mixing the rubber;  
 calendaring the rubber to form a rubber sheet;  
 cutting the rubber sheet into a plurality of rubber patches;  
 attaching the rubber patches into a mold and position the rubber bladder therein to form the middle rubber layer;  
 curing the rubber patches and the rubber bladder;  
 placing an adhesive over the middle rubber layer;  
   making leather patches, comprising: 
 cutting a leather to form leather patches each having a perimeter defining a desired shape;  
   cutting generally along the perimeter of at least one of the leather patches to reduce a thickness of the at least one leather patch along the perimeter;    placing the leather patches on the middle rubber layer to form a leather ball with a simulated sewing pattern.    
     
     
         3 . A method for producing a leather ball with a simulated sewing pattern, comprising: 
 making a rubber bladder;    making a middle rubber layer positioned generally over the rubber bladder;    making leather patches, comprising: 
 cutting a leather to form leather patches each having a perimeter defining a desired shape;  
 cutting generally along the perimeter of at least one of the leather patches to reduce a thickness of the at least one leather patch along the perimeter;  
   securing the leather patches on the middle rubber layer to form a leather ball with a simulated sewing pattern.